Lockable ejection system and method

ABSTRACT

A cartridge carrier has a base with a recessed plate, a top surface, and a bottom surface. An locking ejection mechanism is coupled to the base. A guide may be coupled to the top surface of the base to receive the cartridge and an interposer board may be coupled to the guide.

FIELD OF THE INVENTION

The present invention relates to electronic devices which utilize portable media such as portable disc drives, magnetic media, optical discs and the like. More particularly, the present invention relates to ejection systems for such electronic devices.

BACKGROUND OF THE INVENTION

As the value and use of information increases, individuals and businesses seek additional ways to process and store information. Portable data storage media such as portable disc drives, magnetic media, optical discs and the like are often used to store data and transfer data between electronic devices such as computers. For example, with the advent of personal computers and workstations, it is often necessary to remove the medium on which computer data is stored. A user may desire to remove a storage medium to carry it to a different site and/or a different computer system. It may also be desirable to remove the storage medium to a secure location when the stored computer data is sensitive or secret, or a back-up copy is needed.

Removable hard disc drives are typically housed in a shell or cartridge having isolating materials to protect the disc drive in case of a free fall onto a hard surface. For example, a cartridge 100 (FIG. 1) may include a ruggedized container that houses a hard disc drive. The cartridge can be connected to a larger computer system or network via a carrier permanently located in a desktop or server system. The cartridge may also be removable from the desktop or server system on an as needed basis. Either the original cartridge is reinserted or a different cartridge can be inserted back into the desktop or server. This insertion/removal cycle of the carrier may occur several times throughout the work day.

Each time the cartridge is inserted into the desktop or server system, it must be electrically interconnected with the host computer by way of a plurality of interfaces connectors. For example, a ribbon cable can run from the disc drive to terminate at a disc drive interface connector which must be mechanically coupled to a complementary disc drive interface connector within the cartridge. Thus, the repeated connect/disconnect cycles of the cartridge results in the wearing of parts such as connectors. It is desirable to have a cartridge system that is able to provide power and data signals from the system to the hard disc drive that is able to withstand wear.

It is also desirable to provide a system to permit a user to insert the cartridge into the carrier and eject the cartridge. However, it is possible for a user to unintentionally eject the cartridge from the carrier. This can be undesirable, for example if the cartridge is ejected while data is being written to the cartridge or read from the cartridge, in which case the data can be corrupted.

BRIEF DESCRIPTION OF THE INVENTION

A cartridge carrier has a base with a recessed plate, a top surface, and a bottom surface. An ejection mechanism may be coupled to the base, and the ejection mechanism includes a locking system.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated into and constitute a part of this specification, illustrate one or more embodiments of the present invention and, together with the detailed description, serve to explain the principles and implementations of the invention.

In the drawings:

FIG. 1 illustrates an embodiment of a removable cartridge.

FIGS. 2A and 2B illustrate an embodiment of a cartridge carrier.

FIGS. 3A and 3B illustrate an embodiment of the base.

FIG. 4 illustrates an embodiment of a cartridge guide.

FIGS. 5A-5E illustrate an embodiment of an ejection mechanism.

FIGS. 6A and 6B illustrate an embodiment of an interposer board.

FIG. 7 illustrates a method to assemble the carrier.

FIGS. 8A-8C illustrates an embodiment of the carrier when not in use.

FIGS. 9A-9E illustrates a method for insertion of a cartridge into the carrier.

FIGS. 10-12 illustrate an embodiment of the locking mechanism of the present invention.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENT

Embodiments are described herein in the context of a cartridge carrier. Those of ordinary skill in the art will realize that the following detailed description is illustrative only and is not intended to be in any way limiting. Other embodiments will readily suggest themselves to such skilled persons having the benefit of this disclosure. Reference will now be made in detail to implementations as illustrated in the accompanying drawings. The same reference indicators will be used throughout the drawings and the following detailed description to refer to the same or like parts.

In the interest of clarity, not all of the routine features of the implementations described herein are shown and described. It will, of course, be appreciated that in the development of any such actual implementation, numerous implementation-specific decisions must be made in order to achieve the developer's specific goals, such as compliance with application- and business-related constraints, and that these specific goals will vary from one implementation to another and from one developer to another. Moreover, it will be appreciated that such a development effort might be complex and time-consuming, but would nevertheless be a routine undertaking of engineering for those of ordinary skill in the art having the benefit of this disclosure.

FIG. 1 illustrates an embodiment of a removable cartridge. The cartridge 100 may be any shape or size necessary for its use. The cartridge 100 may have notches 102 and orientation tab channel 104 to assist in the positioning of the cartridge 100 in the carrier and to notify a user that the cartridge 100 is properly inserted into the carrier.

Referring now to FIGS. 2A and 2B, diagrams of an embodiment of a cartridge carrier. The cartridge carrier, generally numbered 200, may have a top cover 202, a bottom cover 204, and a base 206 thereby forming an enclosure. The base 206 connects the bottom cover 204 and the top cover 202 and is positioned within the enclosure.

The carrier 200 may be designed to fit into a 3.5 inch form factor for installation into a desktop or server box bay. The carrier may be made of any dimensions necessary, but may have an outside dimension of about between 90-110 mm width, 30-50 mm height, and about 130-190 mm length.

The carrier may have an opening assembly 210 to provide access to the enclosure and to guide the cartridge 100 into the carrier. The opening assembly 210 may have a door 208, a light pipe opening 214, and port 213 for an eject button 216. The opening assembly 210 may be contoured to the profile of the carrier 200, and may be larger in height and width than the carrier 200. The opening assembly 210 may be removably connected to the carrier 200 by any means such as snap fit, friction fit, attached with an adhesive, and the like. The door 208 may be designed to be spring closed when a cartridge is not present and may contain a plurality of risers 218 a, 218 b to contact the cartridge 100. The ridges reduce wear marks on the door and the cartridge 100.

An embodiment of the base 206 is illustrated in FIGS. 3A and 3B. The base 206 has a top surface 308, a bottom surface 304, and a recessed plate 300. The recessed plate 300 may be positioned between two co-planar plates 302 whereby the recessed plate 300 and the two co-planar plates 302 are oriented on different planes. The base 206 may also have a plurality of mounting holes 310 along the sides and bottom surfaces to attach the carrier 200 to a desktop or server bay.

FIG. 4 illustrates an embodiment of a cartridge guide. A cartridge guide, generally numbered 400, may be coupled to the top surface 308 of the base 206 to receive the cartridge. The cartridge guide 400 may be removably connected to the opening assembly 210 through a variety of means such as the use of a plurality of assembly mates 402 to mate with the opening assembly. However, the opening assembly may also be connected to the cartridge guide 400 with screws, adhesives, and the like. At least one orientation tab 404 may be positioned within of the cartridge guide 400 to prevent improper insertion of the cartridge into the carrier. The orientation tab 404 may mate with and slide along orientation tab channel 104. Additionally, the cartridge guide 400 may have mounting holes or mating features in the rear to connect with electronics and/or printed circuit boards (PCBs).

The base 206 and guide parts, such as the orientation tab 404 and cartridge guide 400 itself, are in sliding contact with the cartridge during insertion or loading and extraction or ejection of the cartridge. The cartridge may be guided by the two co-planar top surfaces 302, the base 206, and the inside surfaces of the cartridge guide 400. Thus, to provide a smooth and low friction surface, these surfaces may be treated with hot-dipped galvanized Teflon coating, and the like. Both the base 206 and the cartridge guide 400 may be made of any light but strong material such as sheet metal, plastic, aluminum, and the like.

FIGS. 5A-5E illustrate an embodiment of an ejection mechanism. The ejection mechanism has a spring plate 500 connected to the base 206 within the recessed plate 300. The spring plate assists in the ejection of the cartridge from the carrier as will be described in detail below. The spring plate 500 has cartridge contact member 904 to contact the cartridge when inserted into the carrier. Four rivets 502 a, 502 b, 502 c, 502 d, on the top surface of the recessed plate 300, receive and guide the spring plate 500. The heads of the rivets 502 a, 502 b, 502 c, 502 d may be positioned below the plane of the two co-planar plates 302 to prevent contact with the cartridge. The spring plate 500 is assembled onto the recessed plate 300 by aligning corresponding openings 504 a, 504 b, 504 c, 504 d with the rivets 502 a, 502 b, 502 c, 502 d. The spring plate 500 is then slid in the direction of arrow A. Once the spring plate 500 is secured, an extension spring 508 is positioned on spring tabs 506 a, 506 b on the underside of the spring plate 500 and bottom surface of the base 206, respectively, as illustrated in FIG. 5B.

A slider plate 510 is positioned on the bottom surface 304 of the base 206 with a first portion 514 positioned on the recessed plate 300 and a second portion 516 positioned on one of the co-planar plates 302. The slider plate 510 assists in the insertion and ejection of the cartridge as will be described in detail below. The first portion 514 is positioned in a different plane than second portion 516 to conform with the recessed plate 300 and the co-planar plate 302, respectively. Three rivets 512 a, 512 b, 512 c on the bottom surface 304 receive and guide the slider plate 510. The slider plate 510 is assembled onto the base 206 by aligning corresponding openings 518 a, 518 b, 518 c with rivets 512 a, 512 b, 512 c. The slider plate 510 is then slid in the direction of arrow B. Once the slider plate 510 is secured on the base 206, an extension spring 520 is positioned on spring tabs 506 c, 506 d on the slider plate 510 and base 206, respectively (also illustrated in FIG. 5C).

Kick-out levers 522 a, 522 b, as illustrated in FIG. 5C, may be used to assist in the extraction of the cartridge as further described below. Kick-out levers 522 a, 522 b may have a first aperture 528 a, 528 b to be received by pins 524 a, 524 b on the slider plate 510. A second aperture 538 a, 538 b may be positioned over pins 540 a, 540 b on the base 206. Extension members 530 a, 530 b extend through apertures 526 a, 526 b on the base 206 to contact the cartridge when inserted into the carrier. Once properly positioned, the kick-out levers 522 a, 522 b may be held in place by retaining rings 532 a, 532 b which fit into grooves on pins 540 a, 540 b. Pins 526 a, 526 b, and 540 a, 540 b may have a height greater than the height of the kick-out levers 522 a, 522 b such that pins 526 a, 526 b, and 540 a, 540 b extend outwardly from the kick-out levers 522 a, 522 b. This allows for the insertion of the retaining rings 532 a, 532 b on the grooves of pins 540 a, 540 b. Retaining rings 532 a, 532 b may be any type of securing ring that is able to secure the kick-out levers 522 a, 522 b, such as e-clips.

The ejection mechanism may also have a lever assembly 534 as illustrated in FIG. 5D. The lever assembly 534 may have an aperture 536 to mate with pin 542 and may be held in position with retaining ring 532 c that fits into a groove on pin 542. A rivet 544 may extend downwardly on the lever assembly 534 such that it may be received by aperture 546. A roller 548 extending downwardly from the lever assembly 534 may be received by aperture 550 on the base 206. The roller 548 contacts the cartridge as it is inserted into the carrier and connects with cartridge notch 102. The lever assembly 534 may be in movable communication with the slider plate 510 through follower pin 554, which is inserted into a cam surface notch 556 on the slider plate 510. Once assembled, an extension spring 552 may be connected to the lever assembly 534 at spring tab 506 e and to the spring tab 506 d on the base 206 as illustrated in FIG. 5E.

The materials for all moving components discussed above may be made from materials which withstand wear and friction. For example, rivets 502 a, 502 b, 502 c, 502 d, 512 a, 512 b, 512 c, 544 may be made from a soft stainless steel, the spring plate 500 and slider plate 510 may be made of polished stainless steel or aluminum, kick-out levers 522 a, 522 b may be made of injected molded plastic or zinc die cast, lever assembly 534 may be made of brass or Teflon-coated aluminum, and roller 548 may be made of brass or lubricated plastic. The examples above are for exemplary purposes only and not intended to be limiting as numerous other alternatives are possible.

FIGS. 6A and 6B illustrate an embodiment of an interposer board to interface with the cartridge connector. The connection may be achieved by part tolerance or by manufacturing fixtures. An interposer board or PCB 600 may be mounted to the rear of the cartridge guide 400 with screws 602 a, 602 b, 602 c, 602 d. As further illustrated in FIG. 6A, the cartridge guide 400 may be mounted to base 206 with screws 602 e, 602 f. The interposer board 600 may contain a mating serial ATA (SATA) connector 604 to mate with the cartridge, various alternative electronics (not shown), a light pipe 606, fan connector 608, and power and signal connectors 610. The figures are illustrated with one embodiment of an interposer board 600, however, the interposer board 600 may be configured in any way necessary. For example, an outside connectivity may require a common 12V/5V connector and a 7 pin SATA signal connector, there may be requirements for a universal serial board (USB) interface, or there may be a combined SATA signal and power connector. Furthermore, the interposer board 600 may have voltage regulators to go from 5V to 3.3V, bridge electronics for USB to SATA, additional connectors to connect to additional PCBs, and the like. As such, the configuration of the interposer board may be varied as necessary. Moreover, although the interposer board 600 is illustrated as horizontally oriented to allow for maximum airflow through the carrier, the interposer board may be oriented in any direction as may be necessary.

As illustrated in FIG. 6B, another or an optional PCB 612 may also be connected to the base 206. The base 206 may be designed to support the larger PCB on the bottom surface. The additional PCB 612 may be used for any reason such as data compression. A fan 614 may also be used to further maximize air flow through the carrier. The fan 614 may be mounted to the base 206 with screws 616 a, 616 b and connected to the interposer board 600 for power. A light pipe 606 may also be attached to the bottom surface of the base 206. A first end 620 of the light pipe 606 may be located beneath an LED on the interposer board 600 and the second end 622 may be located to fit into the light pipe opening 214 in the opening assembly 210.

FIG. 7 illustrates a method to assemble the carrier. To assemble the carrier 200, the cartridge guide 400 and interposer board 600 are attached to the base 206. A fan 614 may be attached to the base 206 and interposer board 600. The opening assembly 210 may also be attached to the base 206. The top cover 202 and bottom cover 204 may then be fitted together by any means such as a with snap fit tabs 702 a, 702 b, 702 c, 702 d, 704 a, 704 b, 704 d that mate with the base 206. However, any other means to attach the top cover 202 and the bottom cover 204 to the base 206 may be used such as adhesives, screws, and the like. The top cover 202 and the bottom cover 204 protect the base and other internal parts during transportation, handling, or shipping.

FIGS. 8A-8C illustrates an embodiment of the carrier when not in use. FIG. 8B illustrates the top surface 308 of the base 206 and FIG. 8C illustrates the bottom surface 304 of the base 206 both without illustrating the cartridge guide for clarity. As illustrated in FIG. 8A, the cartridge 100 is to be inserted through door 208. The door 208 may be closed by spring force or any other alternative means.

The spring plate 500 is positioned forward in the direction of arrow F by spring force from extension spring 508 as illustrated in FIG. 8B. In FIG. 8C, the slider plate 510 is pulled rearward in the direction of arrow C by spring force via extension spring 520. The slider plate 510 is pulled back until it meets with limit tab 802 extending outwardly from the base 206. This causes the eject button 216 to be flush against the opening assembly 210 surface. The kick-out levers 522 a, 522 b are pulled forward in the direction of arrow D by the position of the slider plate 510. The lever assembly 534 is spring loaded and held outward in the direction of arrow E against the carn surface notch 556 along the side of the slider plate 510.

FIGS. 9A-9E illustrate a method for inserting a cartridge into the carrier. In FIG. 9A, the cartridge 100 is inserted by hand or robot, in the correct orientation, in the direction of arrow G into the carrier 200. Improper insertion of the cartridge 100 may be prevented through the contour of the opening assembly 210 and orientation tab 404 illustrated in FIG. 9B. As the cartridge 100 is inserted into the carrier 200, the door 208 flips up and the edges of the cartridge 100 and the guiding angles 902 allow for smooth insertion of the cartridge 100 into the carrier 200.

FIG. 9C illustrates the cartridge 100 inserted into the carrier 200 further in time. At approximately three quarters of insertion of the cartridge 100, the cartridge 100 contacts the spring plate 500 at contact member 904. Further insertion of the cartridge 100 will increase the load of insertion on the user or robot as the spring plate extension spring is deflected.

As the cartridge 100 is still further inserted into the carrier 200, as illustrated in FIGS. 9D (top view) and 9E (bottom view of base), at approximately the last 5 mm of cartridge 100 insertion, the interposer board SATA connector 604 mates with the cartridge 100. The cartridge 100 also contacts the extension members 530 a, 530 b of kick-out levers 522 a, 522 b. As the cartridge is forced further into the carrier 200 (FIG. 9E) the extension members 530 a and 530 b are forced rearward which causes the first apertures 528 a and 528 b of kick-out levers 522 a, 522 b to move forward in the direction of arrow I which in turn causes the slider plate 510 to move forward in the direction of arrow I. As the slider plate 510 moves forward, the eject button 216 begins to protrude outwardly from the opening assembly 210. At the same time, the latch assembly 534 moves in the direction of arrow J. Follower pin 554 slides within the cam surface notch 556 on the slider plate 510 as the slider plate 510 moves forward. This causes latch assembly 534 to move in the direction of arrow J. As the cartridge 100 is further inserted into the carrier and the latch assembly 534 continues to move, roller 548 contacts the cartridge notch 102 whereby any audible clicking sound may be heard. This sound indicates that cartridge 100 is filly inserted into the carrier 200.

Once the cartridge 100 is fully inserted, the front face of cartridge 100 is flush with the opening assembly and the eject button 216 protrudes from the opening assembly as shown in FIG. 12 The distance the eject button 216 protrudes outwardly from the opening assembly may be related to the ratio between the pivot point of the kick-out lever and the contact points. The cartridge may be held in position through the strong mating forces of the SATA connections and the lever assembly roller mating with the cartridge notch. Upon connection of the SATA connectors, the fan and the LED may automatically turn on and disc drive activity may turn on the LED. However, it may be appreciated that operation of the LED and fan may be modified depending upon the user. For example, the fan could be controlled to rotate only during long periods of drive activity, upon activation by a circuitry with a temperature sensor, and the like.

To eject the cartridge, the user must push the eject button 216 inward, toward the rear of the device. The eject button 216 translates the slider plate 510 rearward which in turn pivots first apertures 528 a and 528 b rearward. The extension members 530 a and 530 b are in turn forced forward to force the cartridge 100 forward. It should be noted that the extension members 530 a and 530 b contact the cartridge symmetrically about the center of the cartridge to provide equally balanced forces in the direction of the cartridge movement. As the user continues to push the eject button 216 the extension members 530 a and 530 b remain in contact with the cartridge until the cartridge has been forced forward approximately 5 mm, which may be equivalent to the length of the SATA connectors. The rollers of the lever assembly are forced outward by either the cartridge notch radius or the cam surface notch on the slider plate or both. The spring plate pushes the cartridge out of the carrier to a distance of about 15-30 mm. The cartridge may then be extracted from the carrier and the door closes by spring force.

It should now be recognized that it is possible to unintentionally eject the cartridge 100 from the carrier 200, e.g. if a user unintentionally bumps the eject button 216. This can be undesirable, for example if the cartridge 100 is ejected while data is being written to the cartridge or read from the cartridge, in which case the data can be corrupted. To avoid this problem a locking mechanism is provided.

As illustrated in FIGS. 10-12 the locking mechanism includes a ridge 1002 formed on the upper rear of the eject button 216 and extending the width of the button 216. The eject button 216 is affixed to the second portion 516 of slider plate 510 by two cylinders 1004 and 1005 integrally formed with the button 216 and press fitted into holes in the second portion 516. The locking mechanism also includes a lip 1006 formed at the forward end of the plate 302 and extending downward.

The operation of the locking mechanism can now be understood. As the cartridge 100 is inserted into the carrier 200 the eject button 216 is in the position shown in FIG. 10. As the user continues to insert the cartridge 100, as illustrated in FIGS. 9D (top view) and 9E (bottom view of base), at approximately the last 5 mm of cartridge 100 insertion, the interposer board SATA connector 604 mates with the cartridge 100. At this time the eject button 216 begins to protrude outwardly from the opening assembly 210. As the cartridge 100 is further inserted into the carrier and the latch assembly 534 continues to move, roller 548 contacts the cartridge notch 102 whereby any audible clicking sound may be heard. This sound indicates that cartridge 100 is fully inserted into the carrier 200.

Once the cartridge 100 is fully inserted, the front face of cartridge 100 is flush with the opening assembly 210 and the eject button 216 protrudes from the opening assembly as shown in FIG. 11, and the forward edge of the ridge 1002 contacts the rear edge of lip 1006. At this time the locking mechanism is in the unlocked position, and a user can eject the cartridge by merely pushing the eject button 216 rearward. However, if a user wishes to activate the locking mechanism the user pulls the eject button 216 forward. This causes the second portion 516 to flex downward, and the eject button moves slightly downward so that the ridge 1002 moves forward under the lip 1006. It should be noted that the forward face of the ridge is beveled at about 45 degrees to assist the ridge 1002 in sliding under the lip 1006. The user continues to pull on the eject button 216 until forward motion of the eject button is stopped by contact between the extension members 530 a and 530 b with the rear ends of apertures 526 a and 526 b, respectively. At this time the eject button is in the position shown in FIG. 12. The eject button is in the locked position so that if a user applies force horizontally to the eject button 216 toward the rear, rearward motion of the eject button 216 is stopped by contact between the lip 1006 and the ridge 1002. If the user wishes to unlock the system the user pushes the eject button 216 downward while also pushing it rearward so that the second portion flexes downward and ridge 1002 can pass beneath the lip 1006.

While embodiments and applications of this invention have been shown and described, it would be apparent to those skilled in the art having the benefit of this disclosure that many more modifications than mentioned above are possible without departing from the inventive concepts herein. The invention, therefore, is not to be restricted except in the spirit of the appended claims. 

1. A cartridge carrier, comprising: a base having a recessed plate, a top surface, and a bottom surface; a guide coupled to the top surface of said base; an interposer board coupled to said guide; and an ejection mechanism coupled to said base, said ejection mechanism comprising a locking mechanism.
 2. A cartridge carrier according to claim 1 wherein said ejection mechanism further comprises: a spring plate coupled to the recessed plate on the top surface; a slider plate coupled to the bottom surface of the base; at least one kick-out lever coupled to the slider plate and base; and a lever arm coupled to the slider plate.
 3. A cartridge carrier according to claim 1 wherein said locking mechanism comprises an eject button coupled to said slider plate.
 4. A cartridge carrier according to claim 1 wherein said locking mechanism comprises: an eject button coupled to said slider plate; a ridge coupled to said eject button; and a lip coupled to said base, wherein said lip, said slider plate and said ridge are constructed and located so that a user can orient said lip in locking engagement with said ridge.
 5. A cartridge carrier according to claim 4 wherein said lip, said slider plate and said ridge are constructed and arranged so that a user can orient said lip in an unlocked position with respect to said ridge.
 6. The carrier of claim 1 further comprising a top cover coupled to the base.
 7. The carrier of claim 1 further comprising a bottom cover coupled to the base.
 8. The carrier of claim 2 further comprising a first spring coupled to the slider plate and the base.
 9. The carrier of claim 2 further comprising a second spring coupled to the spring plate and the base.
 10. The carrier of claim 1 wherein the interposer board further comprises a serial ATA connector.
 11. The carrier of claim 1 wherein the interposer board further comprises a power connector and a signal connector.
 12. The carrier of claim 1 further comprising a fan coupled to the base.
 13. The carrier of claim 1 further comprising a temperature sensor coupled to the interposer board.
 14. The carrier of claim 1 further comprising a light emitting diode coupled to the base.
 15. The carrier of claim 1 further comprising a circuit board coupled to the bottom surface of the base.
 16. A lockable ejection system, for use with transportable media for storing electronic data and a computer system comprising means to selectively connect to said transportable media and transfer electronic data between said computer system and said transportable media and disconnect from said transportable media, said lockable ejection system comprising: an ejection mechanism coupled to said computer system to connect said transportable media to said computer and to eject said transportable media from said computer system; and, a locking mechanism coupled to said ejection mechanism to selectively prevent said ejection mechanism from ejecting the transportable media.
 17. A lockable ejection system according to claim 16 wherein said ejection mechanism further comprises: a slider plate coupled to said computer system; and, at least one kick-out lever coupled to said slider plate.
 18. A lockable ejection system according to claim 16 wherein said locking mechanism comprises an eject button coupled to said slider plate.
 19. A lockable ejection system according to claim 16 wherein said locking mechanism comprises: an eject button coupled to said slider plate; a ridge coupled to said eject button; and a lip coupled to said base, wherein said lip, said slider plate and said ridge are constructed and located so that a user can orient said lip in locking engagement with said ridge.
 20. A cartridge carrier according to claim 19 wherein said lip, said slider plate and said ridge are constructed and arranged so that a user can orient said lip in an unlocked position with respect to said ridge.
 21. A method to prevent unintentional ejection of transportable media from a computer system, the method comprising: engaging a locking eject button so that a user cannot eject the transportable media unless the user disengages the locking mechanism.
 22. A method to prevent unintentional ejection of transportable media from a computer system, using a locking eject button, the method comprising: engaging the locking eject button by moving the locking eject button in a first direction until the locking eject button engages a locking mechanism.
 23. A method to prevent unintentional ejection of transportable media from a computer system, and to allow intentional ejection, using a locking eject button, the method comprising: engaging the locking eject button by moving the locking eject button in a first direction until the locking eject button engages a locking mechanism; and thereafter disengaging the locking eject button to allow ejection of the transportable media.
 24. A method according to claim 22 wherein the step of disengaging the locking eject button comprises moving the locking eject button in a first direction while simultaneously moving the locking eject button in a direction which is substantially perpendicular to the first direction. 